อยากจะเปลี่ยนชื่อไฟล์รูป หลังจาก upload ช่วยหน่อยครับ

<?
		//*** Update Record ***//
include("config.inc.php");
		$strSQL = "UPDATE  Applicant ";
		$strSQL .=" SET FName = '".$_POST["FName"]."' WHERE IDCard = '".$_POST["IDCard"]."' ";
		$objQuery = mssql_query($strSQL);		
	
	if($_FILES["filUpload"]["name"] != "")
	{
		$strFileName = date("YmdHis")."_".$_FILES["filUpload"]["name"];
		if(move_uploaded_file($_FILES["filUpload"]["tmp_name"],"photo/".$strFileName))
		{

			//*** Delete Old File ***//			
			@unlink("photo/".$_POST["hdnOldFile"]);
			
			//*** Update New image ***//
			$strSQL = "UPDATE  Applicant ";
			$strSQL .=" SET LinkImage = '".$strFileName."' WHERE IDCard = '".$_POST["IDCard"]."' ";
			$objQuery = mssql_query($strSQL);		
			echo "<meta http-equiv='refresh' content='3; url=member_detail.php'>" ;
		}
	}
?>

		//*** Update Record ***//
include("config.inc.php");
		$strSQL = "UPDATE  Applicant ";
		$strSQL .=" SET FName = '".$_POST["FName"]."' WHERE IDCard = '".$_POST["IDCard"]."' ";
                $strSQL .=" SET LName = '".$_POST["LName"]."' WHERE IDCard = '".$_POST["IDCard"]."' ";
                $strSQL .=" SET Email = '".$_POST["Email"]."' WHERE IDCard = '".$_POST["IDCard"]."' ";
		$objQuery = mssql_query($strSQL);

include("config.inc.php");
		$strSQL = "UPDATE Applicant SET ";
		$strSQL .="Salary = '".$_POST["Salary"]."' ";
		$strSQL .=",FName = '".$_POST["FName"]."' ";
		$strSQL .="WHERE IDCard = '".$_POST["IDCard"]."' ";
		$objQuery = mssql_query($strSQL);
		mssql_close($objConnect);